William h



(No M odel.) J

W. H. HOWLA-ND'.

ORE-AMALGAMATOR.

110,244,240. Patented July 12,1881.-

I BY M ATTORNEY-S.

u PETERS, Pinch-Lithographer. wman mn, n.0,

UNITED STATES PATENT OFFICE.

WILLIAM H. HOWLAND, OF SAN FRANCISCO, CALIFORNIA.

ORE-AMALGAMATO R.

I SPECIFICATION forming part of Letters Patent No. 244,240, dated July12, 1881.

Application filed January 3, 1881.

To all whom it may concern:

Be it known that 1, WILLIAM H. HOWLAND, of the city and county of SanFrancisco, California, have invented a new and useful Improvement inOre-Amalgamators, of which the following is a specification.

The objects of my invention are to obtain the most thorough intermixtureof the quicksilver with the pulverized ore and the least possible lossof quicksilver during the operation.

My invention consists in a stirrer formed by a rotary yoke carryingpaddles combined with a pan fitted with dies, against which the pulp isforced by the paddles, and an inner ring that insures the circulation ofthe pulp, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a plan view of a machine of myimproved construction, the ring being partially removed; and Fig. 2 is avertical section of the same on line at m, Fig. 1.

Similar letters of reference indicate corresponding parts.

A is a circular pan, formed with a central hub, a, for the driving-shaftb, which extends through the pan from below.

B is the supporting-frame of the pan, on which shaft 11 and thedriving-gear is also sustained.

In the bottom of pan A, nearthe sides, is an annular groove, 0, forminga pool below the pan-bottom, and from this pool a passage, d, extendsthrough the side of the pan. This passage is for use in supplyingquicksilver, for which purpose a filling-tube, e, is connected with it,and also for drawing off the pan, which may be done by removing the plugat the outer end of the passage. The upper edge of the pan is fittedwith a ring, f, which curves inward and downward to direct the materialto the center. Within the pan is fitted a beveled ring, 9, that forms aninner case, separated a short distance from the sides of the pan. Thisring 9 may be supported in any suitable manner that will give freepassage for the pulp behind the ring. As shown, it rests by a flangeupon lugs 9 formed on the pan. The pan is further formed at the angle(No model.)

between the bottom and sides with dovetail lugs h, that receive dies 2'.These dies may be more or less in number, and by the (lovetailconnections their removal and placement are rendered convenient.

The driving-shaft b carries a coneshaped yoke, k, which is keyed to theshaft above the hub a, and extends to near the bottom of the pan. At thelower part of the hub it is formed with side lugs, t, to which arms mare bolted. There are six (more or less) of the arms m, and they arefitted at theirouter ends with. plates 12, which are of about the samewidth as the dies 6, and move in the plane of the dies. arms by boltspassing through slots, so that the plates can be adjusted to and fromthe dies. There should be a small space between the outer ends of theplates and the inner surface of the dies.

In operation the revolution of shaft 1) causes the rotation of arms mover the bottom of the pan, and the plates n are moved in front of thedies i. The pan being supplied with pulp and quicksilver, the plates nact to carry the mass around, and by concussion with the dies t theouter portions of the mass are thrown up behind and over ring 9 to thecenter of the pan. A continuous circulation of the whole mass is thusobtained, and the quicksilver is brought into intimate contact with thebroken ore. At the same time the ore is further pulverized between theplates at and dies t.

This machine is durable and effective. The wearing parts can be readilyreplaced when worn. The pool 0 collects a body of quicksilver below themass of ore, and the plates a, moving above the pool, keep the bottomore moving, and at the same time draw or force the quicksilver out ofthe pool. The arms m will be steel or wrough t-iron. The beveled ring 9will be made of copper or of iron, according as to whether silver orgold ore is being worked. This ring, in addition to its mechanicalfunctions, hastens the amalgamation in supplying iron or copper bychemical action. The addition of filings to the mass in the pan is forthis reason not required.

Havingthus described my invention,I claim These plates at are attachedto the as new and desire to secure by Letters Patent- 1. Inore-amalgamators, the rotating yoke 7c, carrying arms m, and plates 12,combined with 5 pan A, provided with dies i, and the ring g,

substantially as described, combined for operation, as set forth.

2. In ore-amalgamators, the curved ring f, combined with pan A, innerring or case, 9,

and revolving stirrers, substantially as and 10 for the purposes setforth.

3. The inner ring or case, g, co1nbined with pan A and rotating stirrerssubstantially as and for the purposes set forth.

WILLIAM H. HOWLAND.

Witnesses Gno. D. WALKER, O. SEDGWIGK.

